OLEFIN BLOCK COPOLYMER

摘要

The present invention relates to an olefin block copolymer showing excellent elasticity, heat resistance and processability. The olefin block copolymer comprises a plurality of blocks or segments comprising an ethylene-based or propylene-based repeating unit and an a-olefin-based repeating unit of a different molar ratio, wherein the olefin block copolymer comprises polymer chains comprising 20-100 short chain branching (SCB) per 1000 carbon atoms, the point in which a first differentiated value of the number Y of short chain branching per 1000 carbon atoms of each polymer chain with respect to the molecular weight X of each polymer chain is 0, exists between the maximum and minimum of molecular weight X.